package com.lmq.liskov;

public class Liskov {
    public static void main(String[] args) {
        A a = new A();
        System.out.println("11-3 = " + a.func1(11,3));
        System.out.println("11-8 = "+ a.func1(11,8));

        System.out.println("-----------------");
        B b =  new B();
        System.out.println("11-3 = " + b.func1(11,3));
        System.out.println("11-8 = "+ b.func1(11,8));
        System.out.println("11+3+9 = "+ b.func2(11,3));




    }
}

class A {
    public int func1(int num1, int num2){
        return num1-num2;
    }
}

class B extends A{
    public int func1(int a, int b){
        return  a + b;
    }

    public int func2(int a, int b){
        return func1(a,b) + 9;
    }
}

